0\Rightarrow b<0\\906.4\quad 4,6+\frac43a>-10\\\frac43a>-10-4,6\\\frac43a>-14,6\\a>-14,6\cdot\frac34\\a>-10,95\\856.2\quad 14(2x-3)-5(x+4)=2(3x+5)+5x\\28x-42-5x-20=6x+10+5x\\23x-62=11x+10\\12x=72\\x=6\\856.4\quad 6(7x-11)-13(x-6)=14(2x+1)\\42x-66-13x+78=28x+14\\29x+12=28x+14\\x=2" alt="906.2\quad 1,3+\frac{2b}3<1,3\\\frac{2b}3<1,3-1,3\\\frac{2b}3<0\\\frac23>0\Rightarrow b<0\\906.4\quad 4,6+\frac43a>-10\\\frac43a>-10-4,6\\\frac43a>-14,6\\a>-14,6\cdot\frac34\\a>-10,95\\856.2\quad 14(2x-3)-5(x+4)=2(3x+5)+5x\\28x-42-5x-20=6x+10+5x\\23x-62=11x+10\\12x=72\\x=6\\856.4\quad 6(7x-11)-13(x-6)=14(2x+1)\\42x-66-13x+78=28x+14\\29x+12=28x+14\\x=2" align="absmiddle" class="latex-formula">